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Related Experiment Videos

Light-weight RTV silicone for maxillofacial prostheses.

D N Firtell, M L Donnan, C R Anderson

    The Journal of Prosthetic Dentistry
    |November 1, 1976
    PubMed
    Summary

    Mixing foam and conventional silicone rubber creates lighter maxillofacial prostheses. While this mixture reduces weight, it also decreases tear strength, limiting its routine use for all prosthetic applications.

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    Area of Science:

    • Materials Science
    • Biomedical Engineering
    • Prosthodontics

    Background:

    • Maxillofacial prostheses, particularly large ones, face retention challenges due to their weight.
    • Developing lighter materials is crucial for improving the comfort and efficacy of these devices.

    Purpose of the Study:

    • To evaluate the feasibility of creating lightweight maxillofacial prostheses by mixing foam RTV silicone rubber with conventional RTV silicone rubber.
    • To assess the properties of these novel silicone mixtures for prosthetic applications.

    Main Methods:

    • Formulating various mixtures of foam and conventional RTV silicone rubber.
    • Testing the formulated materials for strength, molding accuracy, color application, color stability, and texture.
    • Utilizing a specialized flask and mold venting to manage expansion issues from foam silicone rubber.

    Main Results:

    • Molding accuracy, texture, and color application/stability challenges were successfully addressed.
    • A reduction in material weight was achieved, but this was proportional to a decrease in tear strength.
    • The mixture's reduced tear strength precluded its routine use in all cases.

    Conclusions:

    • Foam and conventional silicone rubber mixtures can be effectively used for lightweight maxillofacial prostheses when weight is a critical factor and sufficient thickness ensures adequate strength.
    • This material is a viable option for specific applications where weight reduction is paramount and material strength compromises are acceptable.

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